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Neuroanatomy 1 > Cerebellum quiz > Flashcards

Cerebellum quiz Flashcards

(75 cards)

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1
Q

Functions

A
  1. sensory input on the momentary status of muscle contraction, joint tensions, visual and auditory input on equilibrium
  2. muscle tone, posture, smooth and effective voluntary movements
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2
Q

Input fibers are entirely ___

A

Subconscious

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3
Q

Output is ___

A

Indirect

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4
Q

Equilibrium= ___ while balance= ___

A

Sensory, motor

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5
Q

What tract is in the cerebellum? (ipsilateral)

A

Anterior spinocerebellar tract

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6
Q

___ is one of the cerebellum’s greatest attributes

A

Compensation

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7
Q

It’s attached to the MO via the ___

A

Inferior cerebellar peduncle

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8
Q

It’s attached to the pons via the ___

A

Middle cerebellar peduncle

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9
Q

It’s attached to the midbrain via the ___

A

Superior cerebellar peduncle

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10
Q

The inferior and middle cerebellar peduncles __ the cerebellum

A

Enter

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11
Q

The superior cerebellar peduncle ___ the cerebellum

A

Leaves

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12
Q

Inferior peduncle distribution

A
  1. afferents dominate

2. efferents are present

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13
Q

Middle peduncle distribution

A
  1. afferents only
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14
Q

Inferior peduncle distribution

A
  1. afferents are present

2. efferents dominate

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15
Q

Which is the largest peduncle?

A

Middle

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16
Q

20% of childhood brain tumors are ___

A

Medulloblastomas

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17
Q

Medulloblastomas arise in the ___

A

Superior medullary velum

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18
Q

The median external subdivision is the ___

A

Vermis

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19
Q

The lateral external subdivision is the __

A

Right and left hemispheres

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20
Q

3 lobes

A
  1. anterior
  2. posterior
  3. flocculonodular
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21
Q

Synonym of vestibulocerebellum

A

Archicerebellum

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22
Q

Lobes of vestibulocerebellum

A

Flocculonodular

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23
Q

Inputs of vestibulocerebellum

A

Vestibular nucleus

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24
Q

Functions of vestibulocerebellum

A

Posture, equilibrium, balance

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25
Synonym of spinocerebellum
Paleocerebellum
26
Lobes of spinocerebellum
Anterior, vermis, medial posterior
27
Inputs of spinocerebellum
Spinocerebellar and cuneocerebellar
28
Functions of spinocerebellum
Muscle tone, trunk, and limb movements
29
Synonym of cerebrocerebellum
Neocerebellum
30
Lobes of cerebrocerebellum
Lateral posterior
31
Inputs of cerebrocerebellum
Cortico-pontocerebellar
32
Functions of cerebrocerebellum
Planning and coordination of skilled movement
33
White matter is called ___
Corpus medullare
34
White matter is made up of ___
1. afferent projection fibers 2. efferent projection fibers 3. commissural fibers 4. association fibers
35
The branching tree in white matter is called ___
Arbor vitae
36
Isolated in the white matter are found 4 pairs of nuclei called ___
Deep or central cerebellar nuclei
37
External features
1. fissures 2. sulci 3. folia
38
T/F: the gray cortex is fairly uniform as to depth and cytoarchitecture
True
39
Most common neuron cell types
1. purkinje 2. Golgi type II 3. stellate 4. basket 5. granular
40
3 laminae
1. outer (molecular layer) 2. middle (purkinje cell body layer) 3. inner (granular layer)
41
Which layer has the most synaptic activity?
Molecular layer
42
Which layer do you find granular cell bodies?
Granular layer
43
Purkinje cell dendrites are in the ___ layer
Molecular
44
Layers of the cerebellar cortex (superficial to deep)
1. pia matter 2. molecular layer 3. purkinje layer 4. granular layer 5. white matter
45
Which axons are the only efferent (outgoing) fibers from the cerebellar cortex?
Myelinated purkinje
46
Where do myelinated purkinje fibers terminate?
Deep central cerebellar nuclei
47
If a neuron were to bypass the deep nuclei, where would it go to?
Dieter's nucleus
48
What is the neurotransmitter that the purkinje fiber releases?
GABA-> inhibitory
49
Granular cell dendrites are stimulated by incoming ___
Mossy fibers
50
Pathway of a granular cell
1. ascends to molecular layer | 2. bifurcates and synapses with spined branches
51
What is the neurotransmitter of a granular neuron?
Glutamate
52
What are the 2 fiber types that reach the cerebellar cortex?
1. mossy fibers | 2. climbing fibers
53
2 fibers that synapse on purkinje fibers?
1. mossy fibers | 2. granular fibers
54
Mossy fibers mostly originate from ___ and ___ sources
Spinocerebellar and corticopontocerebellar
55
Granular cell axons ascend to synapse with ___ branches
Spined
56
Is glutamate inhibitory or excitatory?
Excitatory
57
Are climbing fibers inhibitory or excitatory?
Extremely excitatory
58
Climbing fibers reach the ___ branches directly
Smooth
59
What is the neurotransmitter of climbing fibers?
Aspartate
60
Names of deep or central cerebellar nuclei
1. dentate 2. emboliform 3. globose 4. fastigial
61
Feature of dentate nucleus
Largest and most lateral
62
What is the name of emboliform and globose?
Interposed nuclei
63
Feature of fastigial nucleus
Most primitive and medial
64
Vestibulocerebellum goes to the ___
Vestibular nucleus
65
Spinocerebellum goes to the ___
Interposed and fastigial nuclei
66
Cerebrocerebellum goes to the ___
Dentate nucleus
67
Non-cerebellar influences go directly to the ___
Deep cerebellar nuclei
68
Fastigial nucleus exit via the ___
Inferior cerebellar peduncle
69
Interposed nucleus exit via the ___
Superior cerebellar peduncles
70
Dentate axons exit via the ___
Superior cerebellar peduncles
71
Which condition is most frequent in lesions of the neocerebellum?
Ataxia
72
What is an intention tremor?
Precise movement or the digits, limbs,-> exaggerated tremor
73
What is dysdiadokokinesia?
Inability to pronate and supinate
74
What is dysmetria?
Measured movements are difficult to make-> under or overshoot a target
75
What is nystagmus?
Repetitive jerking movements of the eyeballs

Neuroanatomy 1 (8 decks)

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